FA Client or FA Proxy devices advertise I-SID-to-VLAN assignments to be supported on the FA Server. These assignments can be accepted or rejected by the FA Server. All communication between FA Proxies or Clients and the FA Server is using LLDP. Successful assignments result in the creation of a Switched UNI I-SIDs and endpoints based on the mapping requests.
The FA Server rejects I-SID-to-VLAN assignment requests if:
FA is not configured properly on the port or MLT.
Router IS-IS is disabled.
Note
For Fabric Attach to operate properly and for the FA Server to accept I-SID-to-VLAN assignment requests, IS-IS must be enabled.
The following error message is logged immediately after IS-IS is disabled, and displays the error message only once in the log file. The system does not display it again when an assignment request is made from the FA Proxy.
CP1 [12/04/15 00:33:49.733:UTC] 0x00374589 00000000 GlobalRouter FA INFO Fabric Attach Assignments will be rejected since ISIS is disabled.
The C-VID and I-SID are not within the supported range.
Different hardware platforms support different customer C-VID ranges. The value 4095 is not supported. The value 4096 indicates that the port is untagged. An I-SID value of 0 is not supported on the FA Server.
The I-SID is already assigned to an IP VPN.
The system displays the error message I-SID is already assigned to an IPVPN.
The I-SID is already in use for SPB multicast.
The system displays the error message SPB Multicast is enabled, ISID 16000000 and greater reserved for dynamic data-isid's used to carry Multicast traffic over SPB.
The I-SID has a value that is reserved for internal use.
The I-SID cannot be used in an IS-IS accept policy.
The I-SID is associated with a platform VLAN and that VLAN is used as a private VLAN (that is, has a secondary VLAN specified).
The I-SID is already in use for Transparent Port UNI.
The port that receives the I-SID-to-VLAN assignment is a member of an MLT, but FA is not successfully enabled on that MLT interface.
There is a resource error on the FA Server system, such as lack of memory.
The number of I-SID-to-VLAN assignments on a port exceeds the maximum limit which is 94.
The number of I-SIDs on the switch exceeds the maximum limit.
The same endpoint is configured on more than one I-SID.
The port or MLT is associated with more than one C-VID in the same I-SID.
When the FA Server rejects I-SID-to-VLAN assignments, aside from viewing the log file, you can use trace to troubleshoot the cause of rejection.
For an example on troubleshooting rejection of I-SID-to-VLAN assignments on the FA Server and for more information on using trace, see Troubleshooting Fabric Attach.